Smart door locks are nothing new. We have seen a bunch of them in the past. The Bolt happens to be a new smart lock from Lockitron with a more elegant design, better battery life, and a more fault tolerant embedded architecture. You will be able to unlock your door using your smartphone. More importantly, you get useful features such as access sharing, activity logging, and Sense.
Bolt lets you share access with your friends and family members easily. You will also know when someone you know has unlocked the door using their phone. Bolt is Bluetooth enabled, but you can add WiFi capability to it using a separate unit called the Bridge. The production of Bolt is slated late Spring, 2015.